165227128 has 32 divisors (see below), whose sum is σ = 340018560. Its totient is φ = 74646880.

The previous prime is 165227119. The next prime is 165227149. The reversal of 165227128 is 821722561.

It is a happy number.

165227128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165227093 and 165227102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075 + ... + 20317.

It is an arithmetic number, because the mean of its divisors is an integer number (10625580).

Almost surely, 2^165227128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165227128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170009280).

165227128 is an abundant number, since it is smaller than the sum of its proper divisors (174791432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165227128 is a wasteful number, since it uses less digits than its factorization.

165227128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11427 (or 11423 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 165227128 is about 12854.0704837028. The cubic root of 165227128 is about 548.7322071569.

Adding to 165227128 its reverse (821722561), we get a palindrome (986949689).

The spelling of 165227128 in words is "one hundred sixty-five million, two hundred twenty-seven thousand, one hundred twenty-eight".